separate compiler and plugin tests

compiler/testData/psi/examples/PolymorphicClassObjects.jet

@@ -0,0 +1,27 @@
+open class Builder<E, R> {
+  [operator] fun plusAssign(item : E)
+  fun result() : R
+}
+
+open class Buildable {
+  fun newBuilder<E, R>() : Builder<E, R>
+}
+
+class List<T> {
+
+  class object : Buildable {
+    override fun newBuilder<E, R>() : Builder<E, R>
+
+  }
+
+}
+
+fun <E, T, R> Map<E, T>.map(f : fun (E) : R) : T<R> where
+  T : Iterable<E>,
+  class object T : Buildable<E, T>  = {
+  val builder = T.newBuilder()
+  for (e in this) {
+    builder += f(e)
+  }
+  builder.result()
+}